In the 1970's I was in the military stationed in Korea. I came home on leave and an old college buddy came to visit. Naturally we stayed up most of the night talking about "old times" (as old as 3-4 years before!) and people we'd known. On guy who came to mind was someone we'd known only slightly, a friend of a friend, from our sophomore year. We couldn't remember his name.
When I got back to Korea I couldn't stop thinking about this. I'd see someone with a similar style of glasses, or hair color, or something, and it would remind me. What was the name? This really bugged me for about a month, until one day when I was going to lunch I physically bumped into the guy at the mess hall.
I still couldn't remember his name and had to ask him. I remember it now, though.
Cum catapultae proscriptae erunt tum soli proscript catapultas habebunt.